/*
package cn.com.mall.gateway.filter;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class MyFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        ServerHttpRequest request = exchange.getRequest();
        String param = request.getQueryParams().getFirst("param");
        if(StringUtils.isEmpty(param)){
            exchange.getResponse().setRawStatusCode(HttpStatus.NOT_ACCEPTABLE.value());
           return  exchange.getResponse().setComplete();
        }

        return chain.filter(exchange);
    }



    @Override
    public int getOrder() {
        return 0;
    }

}
*/
